답안 #411574

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
411574	2021-05-25T14:12:28 Z	nichke	Monochrome Points (JOI20_monochrome)	C++14	35 / 100	2000 ms	14724 KB

monochrome

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define endl '\n'

int ans;
int n;
string s;

vector<int> a, b;
int bit[400005];

void clr() {
	for (int i = 1; i <= 2 * n; i++) {
		bit[i] = 0;
	}
}

void upd(int v, int k) {
	while (v <= 2 * n) {
		bit[v] += k;
		v += (v & (-v));
	}
}

int qry(int v) {
	int res = 0;
	while (v) {
		res += bit[v];
		v -= (v & (-v));
	}
	return res;
}

int sum(int l, int r) {
	return qry(r) - qry(l - 1);
}

int calc(int k) {
	int res = 0;
	vector<pair<int, int>> v;
	for (int i = 0; i < n; i++) {
		v.push_back({a[i], b[(i + k) % n]});
	}
	for (int i = 0; i < v.size(); i++) {
		if (v[i].first > v[i].second) {
			swap(v[i].first, v[i].second);
		}
	}
	sort(v.begin(), v.end());
	clr();
	for (int i = 0; i < v.size(); i++) {
		res += sum(v[i].first, v[i].second);
		upd(v[i].second, 1);
	}
	return res;
}

signed main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cin >> n >> s;
	for (int i = 0; i < 2 * n; i++) {
		if (s[i] == 'W') {
			a.push_back(i + 1);
		} else {
			b.push_back(i + 1);
		}
	}
	for (int i = 0; i < n; i++) {
		ans = max(ans, calc(i));
	}
	cout << ans << '\n';
	return 0;
}

Compilation message

monochrome.cpp: In function 'long long int calc(long long int)':
monochrome.cpp:45:20: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |  for (int i = 0; i < v.size(); i++) {
      |                  ~~^~~~~~~~~~
monochrome.cpp:52:20: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   52 |  for (int i = 0; i < v.size(); i++) {
      |                  ~~^~~~~~~~~~

Subtask #1
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	204 KB	Output is correct
2	Correct	1 ms	312 KB	Output is correct
3	Correct	1 ms	204 KB	Output is correct
4	Correct	1 ms	204 KB	Output is correct
5	Correct	1 ms	204 KB	Output is correct
6	Correct	1 ms	324 KB	Output is correct
7	Correct	1 ms	204 KB	Output is correct
8	Correct	1 ms	204 KB	Output is correct
9	Correct	1 ms	204 KB	Output is correct
10	Correct	1 ms	204 KB	Output is correct
11	Correct	1 ms	204 KB	Output is correct
12	Correct	1 ms	204 KB	Output is correct
13	Correct	1 ms	316 KB	Output is correct

Subtask #2
21.0 / 21.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	204 KB	Output is correct
2	Correct	1 ms	312 KB	Output is correct
3	Correct	1 ms	204 KB	Output is correct
4	Correct	1 ms	204 KB	Output is correct
5	Correct	1 ms	204 KB	Output is correct
6	Correct	1 ms	324 KB	Output is correct
7	Correct	1 ms	204 KB	Output is correct
8	Correct	1 ms	204 KB	Output is correct
9	Correct	1 ms	204 KB	Output is correct
10	Correct	1 ms	204 KB	Output is correct
11	Correct	1 ms	204 KB	Output is correct
12	Correct	1 ms	204 KB	Output is correct
13	Correct	1 ms	316 KB	Output is correct
14	Correct	7 ms	332 KB	Output is correct
15	Correct	7 ms	332 KB	Output is correct
16	Correct	7 ms	332 KB	Output is correct
17	Correct	7 ms	332 KB	Output is correct
18	Correct	5 ms	348 KB	Output is correct
19	Correct	6 ms	316 KB	Output is correct
20	Correct	6 ms	332 KB	Output is correct
21	Correct	5 ms	356 KB	Output is correct
22	Correct	6 ms	332 KB	Output is correct
23	Correct	3 ms	332 KB	Output is correct
24	Correct	5 ms	332 KB	Output is correct
25	Correct	5 ms	332 KB	Output is correct
26	Correct	6 ms	332 KB	Output is correct
27	Correct	6 ms	332 KB	Output is correct
28	Correct	7 ms	332 KB	Output is correct
29	Correct	6 ms	332 KB	Output is correct
30	Correct	7 ms	332 KB	Output is correct
31	Correct	8 ms	352 KB	Output is correct
32	Correct	6 ms	332 KB	Output is correct
33	Correct	7 ms	332 KB	Output is correct

Subtask #3
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	204 KB	Output is correct
2	Correct	1 ms	312 KB	Output is correct
3	Correct	1 ms	204 KB	Output is correct
4	Correct	1 ms	204 KB	Output is correct
5	Correct	1 ms	204 KB	Output is correct
6	Correct	1 ms	324 KB	Output is correct
7	Correct	1 ms	204 KB	Output is correct
8	Correct	1 ms	204 KB	Output is correct
9	Correct	1 ms	204 KB	Output is correct
10	Correct	1 ms	204 KB	Output is correct
11	Correct	1 ms	204 KB	Output is correct
12	Correct	1 ms	204 KB	Output is correct
13	Correct	1 ms	316 KB	Output is correct
14	Correct	7 ms	332 KB	Output is correct
15	Correct	7 ms	332 KB	Output is correct
16	Correct	7 ms	332 KB	Output is correct
17	Correct	7 ms	332 KB	Output is correct
18	Correct	5 ms	348 KB	Output is correct
19	Correct	6 ms	316 KB	Output is correct
20	Correct	6 ms	332 KB	Output is correct
21	Correct	5 ms	356 KB	Output is correct
22	Correct	6 ms	332 KB	Output is correct
23	Correct	3 ms	332 KB	Output is correct
24	Correct	5 ms	332 KB	Output is correct
25	Correct	5 ms	332 KB	Output is correct
26	Correct	6 ms	332 KB	Output is correct
27	Correct	6 ms	332 KB	Output is correct
28	Correct	7 ms	332 KB	Output is correct
29	Correct	6 ms	332 KB	Output is correct
30	Correct	7 ms	332 KB	Output is correct
31	Correct	8 ms	352 KB	Output is correct
32	Correct	6 ms	332 KB	Output is correct
33	Correct	7 ms	332 KB	Output is correct
34	Correct	319 ms	460 KB	Output is correct
35	Correct	315 ms	440 KB	Output is correct
36	Correct	318 ms	452 KB	Output is correct
37	Correct	292 ms	460 KB	Output is correct
38	Correct	266 ms	452 KB	Output is correct
39	Correct	271 ms	432 KB	Output is correct
40	Correct	236 ms	460 KB	Output is correct
41	Correct	219 ms	332 KB	Output is correct
42	Correct	302 ms	440 KB	Output is correct
43	Correct	267 ms	436 KB	Output is correct
44	Correct	285 ms	460 KB	Output is correct
45	Correct	283 ms	432 KB	Output is correct
46	Correct	307 ms	432 KB	Output is correct
47	Correct	251 ms	332 KB	Output is correct
48	Correct	259 ms	460 KB	Output is correct
49	Correct	226 ms	440 KB	Output is correct
50	Correct	284 ms	432 KB	Output is correct
51	Correct	254 ms	440 KB	Output is correct
52	Correct	317 ms	440 KB	Output is correct

Subtask #4
0.0 / 65.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	204 KB	Output is correct
2	Correct	1 ms	312 KB	Output is correct
3	Correct	1 ms	204 KB	Output is correct
4	Correct	1 ms	204 KB	Output is correct
5	Correct	1 ms	204 KB	Output is correct
6	Correct	1 ms	324 KB	Output is correct
7	Correct	1 ms	204 KB	Output is correct
8	Correct	1 ms	204 KB	Output is correct
9	Correct	1 ms	204 KB	Output is correct
10	Correct	1 ms	204 KB	Output is correct
11	Correct	1 ms	204 KB	Output is correct
12	Correct	1 ms	204 KB	Output is correct
13	Correct	1 ms	316 KB	Output is correct
14	Correct	7 ms	332 KB	Output is correct
15	Correct	7 ms	332 KB	Output is correct
16	Correct	7 ms	332 KB	Output is correct
17	Correct	7 ms	332 KB	Output is correct
18	Correct	5 ms	348 KB	Output is correct
19	Correct	6 ms	316 KB	Output is correct
20	Correct	6 ms	332 KB	Output is correct
21	Correct	5 ms	356 KB	Output is correct
22	Correct	6 ms	332 KB	Output is correct
23	Correct	3 ms	332 KB	Output is correct
24	Correct	5 ms	332 KB	Output is correct
25	Correct	5 ms	332 KB	Output is correct
26	Correct	6 ms	332 KB	Output is correct
27	Correct	6 ms	332 KB	Output is correct
28	Correct	7 ms	332 KB	Output is correct
29	Correct	6 ms	332 KB	Output is correct
30	Correct	7 ms	332 KB	Output is correct
31	Correct	8 ms	352 KB	Output is correct
32	Correct	6 ms	332 KB	Output is correct
33	Correct	7 ms	332 KB	Output is correct
34	Correct	319 ms	460 KB	Output is correct
35	Correct	315 ms	440 KB	Output is correct
36	Correct	318 ms	452 KB	Output is correct
37	Correct	292 ms	460 KB	Output is correct
38	Correct	266 ms	452 KB	Output is correct
39	Correct	271 ms	432 KB	Output is correct
40	Correct	236 ms	460 KB	Output is correct
41	Correct	219 ms	332 KB	Output is correct
42	Correct	302 ms	440 KB	Output is correct
43	Correct	267 ms	436 KB	Output is correct
44	Correct	285 ms	460 KB	Output is correct
45	Correct	283 ms	432 KB	Output is correct
46	Correct	307 ms	432 KB	Output is correct
47	Correct	251 ms	332 KB	Output is correct
48	Correct	259 ms	460 KB	Output is correct
49	Correct	226 ms	440 KB	Output is correct
50	Correct	284 ms	432 KB	Output is correct
51	Correct	254 ms	440 KB	Output is correct
52	Correct	317 ms	440 KB	Output is correct
53	Execution timed out	2074 ms	14724 KB	Time limit exceeded
54	Halted	0 ms	0 KB	-

답안 #411574

Compilation message

Subtask #1 4.0 / 4.0

Subtask #2 21.0 / 21.0

Subtask #3 10.0 / 10.0

Subtask #4 0.0 / 65.0

Subtask #1
4.0 / 4.0

Subtask #2
21.0 / 21.0

Subtask #3
10.0 / 10.0

Subtask #4
0.0 / 65.0